VM Backup to remote NFS fails at 2TB point

[Abend1]

Hi,

i have an odd issue where backup of a large VM datastore has begun to fail at the 2TB point over the last few weeks. Previously this was working fine prior to a size increase of the DS. All other VMs backup just fine.

Remote backup server is Windows Server 2019 running NFS service, pointing to a basic disk of 6.7TB. This is mounted onto all Proxmox nodes successfully.

Any assistance would be appreciated.


1601: 2024-01-08 11:53:39 INFO: 80% (1.9 TiB of 2.4 TiB) in 1h 41m 14s, read: 361.7 MiB/s, write: 308.7 MiB/s
1601: 2024-01-08 11:54:51 INFO: 81% (1.9 TiB of 2.4 TiB) in 1h 42m 26s, read: 346.2 MiB/s, write: 323.1 MiB/s
1601: 2024-01-08 11:55:53 INFO: 82% (1.9 TiB of 2.4 TiB) in 1h 43m 28s, read: 399.4 MiB/s, write: 379.3 MiB/s
1601: 2024-01-08 11:56:50 INFO: 83% (2.0 TiB of 2.4 TiB) in 1h 44m 25s, read: 432.7 MiB/s, write: 346.7 MiB/s
1601: 2024-01-08 11:57:59 INFO: 84% (2.0 TiB of 2.4 TiB) in 1h 45m 34s, read: 354.8 MiB/s, write: 255.0 MiB/s
1601: 2024-01-08 12:00:40 INFO: 84% (2.0 TiB of 2.4 TiB) in 1h 48m 15s, read: 127.6 MiB/s, write: 82.5 MiB/s
1601: 2024-01-08 12:00:40 ERROR: vma_queue_write: write error - Broken pipe
1601: 2024-01-08 12:00:40 INFO: aborting backup job
1601: 2024-01-08 12:00:40 INFO: resuming VM again
1601: 2024-01-08 12:00:56 ERROR: Backup of VM 1601 failed - vma_queue_write: write error - Broken pipe

 

[gurubert]

The max file size will be 2 TB on that NFS server.